Cutter head



Sept. 15, 1931; E s. SHIMER 1,823,846

CUTTER HEAD Filed Jan. 11, 1930 4 Sheets-Sheet l am? w 5 Z g I 15 F ,ji

gnvznto'c E. S. SHIMER Sept. 15, 1931.

CUTTER HEAD Filed Jan. 11, 1930 4 Sheets-Sheet 2 E. S. SHIMER ciJTTER HEAD "*Sept. 15, 1931.

Filed Jan. 11, 1950 4 Sheets-Sheet 3 Patented Sept. 15, 1931 UNITED STATES PATENT OFFICE ELMER S. SHIMER, OF MILTON, PENNSYLVANIA, ASSIGNOR TO SAMUEL J. SHIMER 86 SONS, INC., OF MILTON, PENNSYLVANIA, A CORPORATION OF PENNSYLVANIA CUTTER HEAD Application filed January 11, 1930. Serial No. 420,163.

This invention relates to an improvement in cutter heads and is designed for use primarily on molding machines.

A larger and stronger variety of machines have recently been designed for turning out sash muntins and rails, also door rails'molded with special designs, so as to match up with the coping tools in the frame of sash and doors which are made in great variety.

The present invention relates to such a cutter head for use with these large and strong varieties of molding machines.

The object of the invention is to simplify the construction of such a cutter head and to securely lock the parts together in a simplified manner, so that the number of parts may be reduced and yet the parts be made stronger and more rigid and heavier than has heretofore been done, to adapt them to the heavier varieties of machines on which they are to be used and also for the heavier kind of work required of them.

In the accompanying drawings:

Fig. 1 is a side elevation of the complete head; v

Fig. 2 is a vertical sectional view through the ring nut for adjusting the parts of the head, parts being shown in elevation;

Fig. 3 is a top plan View of the cutter head;

Fig. 4 is a horizontal sectional View on the line 1- 4 of Fig. 2;

Fig. 5 is a horizontal sectional" view through the complete head Fig. 6 is a perspective view of the detent spring; and V I Fig. 7 is a disassembled perspective view of the parts of the cutter head.

The cutter head is made o-ftwo main sections, the lower section being designated generally by the letter A, while the upper section is designated generally by the letter B. These'are termed lower and upper sections merely for purposes of illustration and de scription and because, ordinarily, they would occupy those positions in the assembledtool.

The cutter head is designed to be mounted on a spindle 1, as shown in Fig. 1, and held in place by a collet 2, which is of the expanding type, being locked and regulated by a nut 3 rotatably mounted in the upper end of the lower section A. The manner of locking the cutter head on the spindle 1 is similar to that set forth in my former patent No. 1,000,850, of August 15, 1911.

Each of the main sections of the cutter head A and B is initially formed of two square blocks of steel forgings-or the like, planed on all four sides. The lower section A has a groove 4 formed therein, within which is a circular hub 5 threaded at its upper end as at 6. This section is then planed axially and radially betweenthe four corners, forming upstanding posts 7 with channels 8 therebetween, and which posts are spaced about the groove 4 by a flange 9, which formsthe bottom of the groove and which extends radially from and circumferentially of the lower end of the hub 5.

The upper section B has a hub 10 adapted to'fit over the hub 5 and to turn thereon in fitting the sections together, as well as slidable longitudinally thereof about a common axis. This upper section B is bored out on its under-side and is then planed axially and radially between the four corners, forming the downwardly extending posts 11 with grooves 12 therebetween, these posts being carried at the periphery of the hub 10 and spaced circumferentially.

It will also be noted that the posts 7 and 11 are approximately identical in cross-section and that the spaces between these posts also correspond with the cross-sectional area of each post, so that the upper posts 11 will slidably fit in the grooves 8 between the posts 7 of the lower section while the lower posts 7 will fit in the'grooves 12 in the fitting of the two sections together.

This forms a head with eight sides, as shown in Figs. 3 and 5, with the posts 7 and 11 interlocked with each other.

Each of the posts 7 and 11 is provided with a groove 13 longitudinally thereof, in which is mounted a T-shaped vise-like clamp 14, between the jaws of which is received and held a cutting tool or knife 15. It will be noted by reference to Fig. 1 that the cutting tools 15 carried by the upper section B are inclined on their bases in an upward direction, while the cutting tools carried by the lower section A are inclined downwardly, all of the tools carried by each section being inclined in the same direction. Thus, when the cutters wear back, they may all be adjusted simultaneously to vary the sections relative to each other. This provides an accurate means of adjusting these cutters to compensate for the wear.

The upper section B has a rim 16 formed thereon about which is secured a ring nut 17 held in place by babbitt material 17. This holds the ring nut in place on the upper end of the section B, but permits turning movement thereof relative to said section. The ring nut is internally threaded to screw onto the threaded portion 6 of the hub 5, so as to adjust the sections A. and B longitudinally of each other.

To regulate the adjustment and to hold the ring nut in its adjusted positions, it is provided with a circular spring detent 18, as shown in Figs. 4c and 6, having one end fixed in the nut 17 by a set screw 19 or the like, while the other end is free and carries a tooth 20 in position to engage in the notches 21 formed in the upper edge of the rim 16 of the hub10. This spring detent 18 holds the ring nut 17 from turning, when the head is in motion on the machine. A. slight displacement of the ring would act through the threaded portion 6 to cause a displacement of the cutters and their rela ion to each other. The Babbitt metal 17 permits the ring nut to have only rotary action about the hub 10 without relative change of vertical position on this upper section, but by reason of its threaded connection with the hub 5 of the lower section. a vertical adjustment of the sections is effected when turning the ring either to the right or left, which adjusts the series of cutting tools according to the adj ustment of the ring to meet the requirements.

A very fine adiustment of the cutters may be effected in this wav and one that is appreciated for its quick change without disturbing any machine adjustments.

It will be noted that the cuttingtools or bits are divided into two series, one carried bv the upper section B corresponding with the upper section of the pattern, and the other carried by the posts of the lower section A and corresponding with the lower section of the pattern. The upper section moves vertica lv or longitudinall of the axis of the head upon a turning of the ring nut 17 on t e threaded portion 6 of the hub 5. This a lows t e bits or cutting tools to change the width of the groove and. in the case of a door pattern. to correspond with a change of door thickness. The only change necessarv to effect this adjustment s a change in the rotary nositionof the ring nut. This causes an expansion or contraction of the series of bits, making them suitable for thicker or thinner patterns, as desired, a change which is very useful to the practical machine operator in the door and sash mill by a very simple and quick adjustment, and one that will save much time over the adjustment of each cutter separately on each of the head sides if the head were made in one piece of solid metal.

This advantage is effected by the provision of a cutter head of the character illustrated, which is made in two sections, each of which is channeled out on each side of a square head, forming a plurality of posts, of which eight are shown, which interlock and overlap in order that the knives fastened on the external surface of the posts or head sides may receive their adjustment by a turning of the ring nut, which controls the adjustment between the two sections.

I claim:

1. A cutter head comprising at least two sections having hubs telescopically connected together, interfitting arms carried by the peripheries of said sections for carrying cutting tools, the inner hub having a peripheral threaded portion, an adjusting nut screwed onto the threaded portion and connected wit-h the other section and rotatable relative thereto, said outer section having notches therein, and a spring detenthaving an end'fixed to the nut and having the opposite end in positi on to engage the notches for normally tending to hold the nut against'rotation.

2. A cutter head comprising at least two sections having hubs telescopically connected together, interfitting arms carried by the peripheries of said sections for carrying cutting tools, the inner hub having a peripheral threaded portion. an adjusting nut screwed onto the threaded portion for adjusting the sections relative to each other, the other section having a peripheral flange on the hub thereof. means for rotatably connecting the nut with the flange for rotation relative to said last-mentioned section and holding the nut against removal. the end of the hub of said last-mentioned section having notches formed therein, and a detent spring having an end fixed to the nut and the opposite end in position to engage the notches for normally tending to hold the nut against rotation and the sections in their adjusted positions 3. Acutterhead comprising at least two sections. each section being approximately souare and having achannel cut in each side thereof. one side of said channel extending diagonallv of he square section, a post disposed beside the channel of each side, the posts of one section extending into the channels of the other section in interfitting relation.

4. A cutter head comprising at least two sections.each section being approximately square and having a channel cut in each side thereof, one side of said channel extending diagonallv of the square section. a post disposed beside the channel of each side, the posts of one section extending into the channels of the other section in interfitting relation, cutters carried on the outer faces of the posts, and meansfor adjusting the sections relative to each other to adjust the cutters.

5. A cutter head comprising at least two sections, each section being approximately square and having a channel cut in each side thereof, one side of said channel being in a plane extending diagonally of the square section and approximately through the center axisofthe cutter head, the opposite side of the channel being in a plane extending approximately at right angles to the face of said side and through the center axis of the cutter head, each side ofeach section having a post formed beside the channel therein and corresponding with the contour of the channels of the other section to fit thereinto, said posts being adapted to hold cutters.

6. A cutter head comprising at least two sections, each section being approximately square and having a channel cut in each side thereof, one side of said channel being in a plane extending diagonally of the square section and approximately through the center axis of the cutter head, the opposite side of the channel being in a plane extending approximately at right angles to the face of said side and through the center axis of the cutter head, each side of each section having a post formed beside the channel therein and corresponding with the contour of the channels of the other section to fit thereinto, said posts being adapted to hold cutters, a central hub connected with the posts of each section, said hubs being telescopically connected together, and a nut rotatably fixed to one section and having screw-threaded engagement with the other section for adjusting the sections relative to each other to adjust the cutters.

In testimony whereof I aflix my signature.

ELlWER S. SHIMER. 

